NamplateCombatText

Numbers scroll up from the top of the nameplate. A normal hit is yellow. A heal is green. A critical hit is the same color, only bigger. When several numbers pop at once, they step apart instead of covering each other.

Type /cts and a window opens with a yellow 13 and a red 48. Move the sliders and those samples change on the spot: size, how high they start, how far they scroll, how big crits are, and how far apart simultaneous hits sit.